Solving Systems of Linear Equations: Graphing — Unit test Answers

Irina wants to build a fence around a rectangular vegetable garden so that it has a width of at least 10 feet. She can use a maximum of 150 feet of fencing. The system of inequalities that models the possible lengths, l, and widths, w, of her garden is shown. w ≥ 102l + 2w ≤ 150

Which statements must be true about their heights? Select three options.

One winter day, the outside temperature, y, never dropped below −1°. The inside temperature, x, of a car was always at least 4° warmer than the outside temperature. Which graph represents the solution to the system of inequalities that models this situation?

Keitaro walks at a pace of 3 miles per hour and runs at a pace of 6 miles per hour. Each month, he wants to complete at least 36 miles but not more than 90 miles. The system of inequalities represents the number of hours he can walk, w, and the number of hours he can run, r, to reach his goal.3w + 6r ≥ 363w + 6r ≤ 90

Consider the system of inequalities and its graph.y ≤ –0.75xy ≤ 3x – 2